Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc6854fde2b042d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 18:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5a9e718039612e369f2d70297a18f4a SHA-1: 6e959db4b0c179ebb8769057d9f05d8aff4134f9 SHA-256: 2fc6854fde2b042d88d05e9039b28c213942268a9c738a76622bc87e1190b7a9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external websites, indicating a link farm or redirection attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to game avatars and APK data, likely serving as a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=game+avatar+android+apk%252B+data
    • http://mideladab.todd-pettys.com/uploads/1/3/1/6/131607943/ganodisisu.pdf
    • http://vudonisug.ycinvited.com/uploads/1/3/1/3/131379163/nibujezo.pdf
    • http://files.apgarassociates.com/uploads/1/3/1/4/131454172/1b87ff2c6046d49.pdf
    • http://zevur.jesipace-berkeley.com/uploads/1/3/0/8/130813694/8736569.pdf
    • http://files.fishermanswharfcampbellriver.com/uploads/1/3/0/8/130814172/1802325.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/muweriweli.pdf
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/os_capites_da_areia.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/38632190787.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/94024376896.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/lijugupixuridile.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/46941906140.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/associao_de_resistores_em_serie_exercicios_resolvidos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/74530032809.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/generate_checksum_paytm_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/5865351544.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/49113619456.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bee.bin
3b38aa0b0cd5ca7f5dfaf3ccdcb81ae3ca42e985723879713e75524eb0303c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEE 4836 bytes
font_01_sfnt_off00006c4b.bin
1bfb7395d8631cfd7fb7d4a801093d0d69d65e272f220b2a561a6d96cba3732c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 11332 bytes
font_02_sfnt_off00009224.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9224 4324 bytes